Nervous system
Videos
In biology, the nervous system is the highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body. The nervous
Horizontal section of the head of an adult female human, showing skin, skull, and brain with gray matter (brown in this image) and underlying white matter
Major elements in synaptic transmission. An electrochemical wave called an action potential travels along the axon of a neuron. When the wave reaches a synapse, it provokes release of a small amount of neurotransmitter molecules, which bind to chemical receptor molecules in the membrane of the target cell.
Illustration of pain pathway, from René Descartes's Treatise of Man
Layers protecting the brain and spinal cord
Biology
Videos
Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth
Nervous system
…In biology, the nervous system is the highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from…
In 1842, Charles Darwin penned his first sketch of On the Origin of Species.
Tree of life by Haeckel